Manley Exhaust Valves 33mm (1mm Oversized) Extreme Duty 2002-2014 WRX / 2004-2021 Subaru STI | 11139-8 Vehicle Model_IS F Splitter removed: Air bypasses the

Splitter removed: Air bypasses the intercooler

Core Thickness: 2"

giving the AMS Subaru EJ Intake Manifold exceptional flow

Designed for enthusiasts who want maximum control without sacrificing ride comfort

Manley Exhaust Valves 33mm (1mm Oversized) Extreme Duty 2002-2014 WRX / 2004-2021 Subaru STI | 11139-8 Vehicle Model_IS F Splitter removed: Air bypasses theManley Performance has been manufacturing the finest stainless steel valves for over 40 years. Manley valves have been the standard of the industry from their inception, a fact that still remains true as they shift their focus and resources to the Sport Compact Market. The Manley Stainless Race Valves feature chrome stems, hard tips, fully machined surfaces and swirl polishing under their heads. These valves are available in both stock and oversized,